Driving arrangement for looms



A@ 2, i949o G, WIGET 2,477,709

DRIVING ARRANGEMENT FOR LOMS Filed sept. 15, 1944 2 sheets-sheet 1 Wm. NM.

2 Sheets-Sheet 2 G. WIGET DRIVING ARRANGEMENT FOR LOOMS ug. 2, T1949.

Filed Sept. l5, 1944 Patented Aug. 2, 1949 UNITED 2,477,709 calvino ARRANGEMENT Fon LooMs Georg Wiget, Arbon, Switzerland, .assigner to Aktiengesellschaft Adolph Saurer, Arnon, Switzer'land spoliation september 13, 1.944, senil no. 553,919 In Germany July 27, 1943 (Cl. 13S-1) 2 Claims. 1

This invention relates to driving arrangements for looms provided with one or more supplemental devices, for example, means for reversing the loom .and/or vmeans for stopping the loom, when the slay is in corresponding predetermined position.

According to the present invention, the vloom is started .or stopped by axially shifting an actu ating rod which extends across the major par-t of the width of the loom and by .means ci which the supplemental devices can also be actuated, in such manner, that to the throwingein oi any of the supplemental devices, corresponds a prezdetermined shifting or .axial rocking movement of the rod in one direction.

Preferably, this actuating rod is spring con-F trolled so as to resist any shifting or axial rock ing from a median position corresponding to the condition of rest, and in the various operative positions the rod is secured only in the position for normal operation by an arresti-ng device, whereas .from all other positions oi adjustment the rod returns automatically into the med-ian position.

In looms provided with a reversing gear :and wtha supplemental stopping device which .is .controlled by a movable part of the loom to stop the slay in a predetermined position, these devices are preferably so connected with .the aotuating rod that as this rod is shifted axially from its position .of rest, in the opposite direcP tion to the direction ofconnecting the normal run, for connecting the reverse and that by rotations ally displacing the actuating rod about its longin tndinal axis, the supplemental stopping .device is rendered operative.

The invention is illustrated by Way of example, in .the drawings afxed to this speciiication and Vforming part thereof, .in which:

Fig. 1 is a sectional side elevation of the loom;

Fig. 1a is an end View;

Fig. 2 is a partial plan View, partly in section.;

Fig, 3 is a .fragmentary Yfront elevation, partly in section, and

Fig. 4 shows a detail in Fig. 3, drawn to a larger scale.

Referring to the drawing and rst to .F.ig. l:

'The slay I, which is arranged for oscillation about the axis of a journal .43 supported in the loom structure, is operatively connected with 4the l gear 46 bythe connecting .rod '4.5. The gear 4.5 meshes on the one .hand with a gear l keyed .on the rshait 48 .and on the other hand with .a ,pinion EB keyed on the shaft .2. This shaft .is `driven by .a motor 6 by means of a coupling which .is com# posed of two .discs or wheels 3 and t and a driving belt 5. The coupling disc 4 which is mounted on the shaft 2 for rotation and axial displacement can be thrown in and .out by means of a control lever 'L which ,is actuated ioy a rod .E which in addition through the intermediary oi a lever .t controls a 'brake liano Il] cooperating with the (115C 3.

The other end. of the rod is operatively oonnested with a connecting rool vHl by .means of a .lever Il, the .shaft l2 and a lever lo. This roo is pivoted to .the .crank pin 1.5 ofa crankshaft l 5 on which is mounted a gear I8.

On the pin 5I ilxed to the gear AIt (Fig. fl) the .two .spring-acted pawls l1, l1" are arranged for oscillation, the spring 5.2 inserted between the .outer pawl ends tending to press their inner ends onto the circumference oi the .crankshaft i5. y .this arrangement, if the inner WW1 ends engage the notches |67, it', .a rotation of the gear lil relative to the shaft .lo is prevented from taking place `and in this oase the gear and the cram;- shaft operate as a unit. The checks 5U, no', mounted on the gear, limit the stroke of the nawls The gear I8 is .in mesh with the racks-helped .Part 20 of an actuating rod IB and Ahe turned in unison with the crankshaft lo by the axial disu placement .of the rod I9. However, rotation of the crankshaft It under the .action oi the racksihaped rod I9 .from the lower to the upper vdead center position of the crank pin i5 can talee place, .owing to the provision oi .a stop 2l, in an antiolookwise direction only. rod 3 for.

- ther carries .a spring 2; (Fig. A1) which .controls the coupling and the brake and tends to .return the connecting rod lil and the .crank ,I5 into the lower .dead `centre lposition oi rest. `When the rod `I9 is moved towards the .right .from .its position of rest, the gear .i8 is operatively connected with the crankshaft 1:6`by Way o f tile .p awls Hf, Il l and notches I6", 16' until pawl t1 meets the stop 21, this position approximately coinciding with the upper dead center positionof the pin 1.5. .Any further small movement o roel I 9 towards the right, .compresses the .Spring 5.2 located .hetween the enter ends of the pawls Il., Il. .Since the paw] il'l' .is lixed in position by the journal lill and notch |16' and .cannot yield, pawl il is compelled to svt-ins about y.the journal 5i until. .its .inner end is withdrawn from the notch t6 .and meets the check AEil. 'Du-ring the last part of this movement, however, the crankshaft pin L5 hasmoved slightly beyond tlieupper dead .oenter posi-tion .in anti clockwise direction and from this movement on the spring 22 and the stop 2l do not cooperate any more in the sense of stop- .ping the loom but act as a safety device against its stoppage. If the upper dead center position of the crank pin I5 coincided exactly with the operative position, then some additional device would have to be provided for preventing the crankshaft I6 from accidentally rotating from the upper to the lower dead center position, which would stop the loom. Such accidental rotation might be occasioned, for instance," by shocks or concussions arising duringoperation.

In the device here shown and described, the connecting rod I4 coacting with the crank pin I5, when in the position shown in Figs. 3 and 4, forms together with the line connecting the axes of the pin and the crankshaft a toggle lever which comes to rest against the stop 2l. This toggle lever becomes active when the pin I5 moves anticlockwise beyond the upper dead center position and is held, with the aid of spring 22, in the operative position.

A cam disc 2l iixed to crankshaft serves for connecting the reversing gear by acting upon one of the arms of a double-armed e lever 26, the other arm of which is pivoted to a rod 25 the other end of which engages with a double-armed lever 24, carrying a reversing roller 23. A spring 28 on the rod 25 tends to press one of the arms of the double-armed lever 26 against the cam disc 21 and to keep the roller 23 out of engagement with the disc 3 during normal operation.

In the gear box or casing Sil of the loom a flange '29 provided with a stud 2t is so secured fr' that this ange can revolve about the longitudinal axis of the actuating rod i9 but is secured against shifting in the axial direction. An opening 3| in this flange corresponds to the cross section of the rack shaped part 25 of rod i9 fui and serves at the same time as a bearing for this part. A spring 32 retains the flange 2S and the actuating rod I9 together with it in the median position (position O of the iiange stud '2Q' in Fig. 1).

The slay I can be stopped in .any position by means of two knives 35, 36, which are actuated bycams 33, 3Q, seated on the shaft d8, and, in the normal operation of the loom, are reciprocated below and above the nose 31 mounted on the lever arm 31 respectively. The cams 33, 32, are so arranged on the shaft 5S that contact of the shoe 35 of the knife 35 with the cam 33 in its highest position coincides with the rear position (I), contact of the shoe 35' of the knife 3E with cam 34 in its highest position with the forward position (II) of the slay.

The lever arm 31 is fixed on the bar lli] which extends movably through the two arms 38'. The bar lll carries near one end the nose 3?'. The arms 3S are fixed to the bar Ali which extends through the brackets 42, l2 mounted on the casing 3B, and so is the arm 3S". rilhetwoarms 38 and arm 38 thus form together a double-armed lever oscillatable about the axis of bar Ill. The lever arm 31 can be so rocked by the pin 2S provided on the flange 29, that the nose 31 enters the path of one of the knives 35, 33. According to the position taken by the crankshaft I6, the arm 38 either acts, during the advance movement, on the pin I6" mounted on shaft I6, or, during reversal, by way of the auxiliary lever 39, on the pawl I1.

The driving arrangement operates as follows:

By shifting the actuating rod I9 in the direction of arrow B in Fig. 4, the gear I8 and by means for the spring pawls I1, I1 the crankshaft I6 is rotated anticlockwise until the pawl I1 encounters the stop 2I and is thereby disengaged, while the crank pin I5 shifts from the lower to the upper position, i. e., from rest to operation. At the same time the connecting rod I4 is pulled upwardly, thereby displacing the rod 8 towards the right through lever I3, shaft I2 and lever I I. In consequence thereof the brake band III is released and the coupling disc l is thrown in by means of the lever 1, while the spring 22 holds back the connecting rod I4 and the crank pin I5 in their respective positions by selflocking eiect, as illustrated diagrammatically in Fig. 4.

For reversal, the rod I9 is shifted axially from the position of rest towards the left, as indicated by the arrow A in Fig. 4, whereby the gear i8 is turned in clockwise direction and by means of the pawls I1', I1, seated in their notches I6', I6, turns the crankshaft I6 in clockwise direction. When this shaft has been rotated through approximately 90 degrees from the lower dead center position (as shown in dot-and-dash lines in Fig. 4), the top end of the double-armed lever 2t has contacted the cam of the disc 21 fixed on the crankshaft I5, being thereby turned anticlockwise and pulling the rod 25 towards the right against the action of spring 28. The bell crank lever 24 is rocked clockwise and the roller 23, which, while the motor is running, constantly rotates in the direction of the arrow, is forced against the disc 3, turning the shaft 2 in reversal direction. -To this end the cam disc 21 is so arranged on the shaft I6 that the reversing roller 23 is thrown in only after the brake band Eil has been loosened but prior to the throwing in the coupling disc 4. The parts are held in the reverse running position by holding rod I 9 by hand in the left hand position.

Where in the normal operation of the loom it is desired that the slay be arrested in one of the two end positions I or II, the supplemental stopping device is thrown in. In that case the actuating rod I9 is rocked about its longitudinal axis until the stud 29 on the flange 29 is in either of the positions marked I and II. By this rocking movement of the actuating rod I9 according to the symbol I (Fig. 4) and the consequent movement of the flange 29 into position I (Fig. 1), the knife 35 is moved by the cam 33 so as to meet the nose 31', whereby the slay I is arrested in the rear end position. Conversely, by rocking the actuating rod I9 according to the symbol II (Fig. 4) and thus moving the iiange 29 into position II (Fig. l) the knife 36 is moved by the earn 34 so as to meet the nose 31', whereby the slay I is arrested in the front dead centre position II. Due to the rocking of the actuating rod I9, the nose 31 on the lever 31 is moved into the path of one of the two knives 35, 3S, and the lever 38', 38, is angularly displaced about its axis, thereby abutting against the stud I6". By this means the crank pin I5 is displaced beyond the upper dead center position and is returned into the lower dead centre position, corresponding to rest, by spring 22.

On the crank pin moving from the upper to the lower dead center position, with the crankshaft being turned clockwise, the gear I8 is disengaged from the crankshaft I6 since the pawl I1 does not oppose itself to such turning movement (Fig. 4). The connecting rod I 4 is shifted downwardly, where by the lever I3, II is turned clockwise (Fig. 1) and the rod 8 is now shifted towards the left, whereby the clutch lever 1 is turned anticloclwise and the wheel e driven by the belt 5 and rotating freely on shaft 2, is disengaged from the Wheel 3 keyed on this shaft. At the same time the rod d turns the lever 9 anticloclwise and tightens the brake band it, causing the wheel 3 to stop. This also arrests the gear di? keyed to shaft 2 and the slay l which is positively connected with this gear by way of connecting rod B5 and gear QS. The actuating rod i9 and gear i3 are then returned to their position of rest by manually shifting the rod towards the left.

In order to arrest the slay, when the movement of the loom is reversed in one of the two end positions I or II, the supplemental lever 39 is rendered operative. In this case the stud l'" is located beyond the range of the lever 38', 38 because the gear i8 has been rotated clockwise due to axial shifting of the actuating rod IS toward the left. The pawls Il, il then engage the rests le' and It respectively and are in the dotted position shown in Fig. 4.

As soon as, due to rocking of the rod IS by means of the flange 29 and the intermediary lever 3l, the nose 3l enters the path of one of the knives 35 or 36, the lever 33', 3S, is rotated about its axis, thereby causing the supplemental lever 3d to bear against the pawl il', whereby the operative connection between the gear I8 and the crankshaft I6 is interrupted, in consequence whereof, the crankpin l5 is moved by the spring 22 into the lower dead centre position and the loom is stopped.

I wish it to be understood that I do not desire to be limited to the details of construction shown and described, for obvious modications will occur to a person skilled in the art.

I claim:

l. A loom comprising in combination, a looming frame and a slay, means for driving said loom, an actuating rod extending transversely of said frame and arranged for executing a longitudinal movement and an angular circumferential moven ment, means for actuating said driving means through a longitudinal movement of said rod to start and stop operation oi the loom, and supplemental mechanism operable by an angular circumferential movement of said rod for stopping the slay in one of its end positions.

2. A loom comprising in combination, a looming frame and. a slay, means for driving said loom, an actuating rod capable of executing two different kinds of movements, extending transversely of said frame, means for actuating said driving means through a longitudinal movement of said rod to start and stop operation of the loom, a spring arranged for acting on said rod to counteract any change of position of said rod from its mean position corresponding to the condition of rest of the loom, and means arranged for arresting and holding said rod only in the position corresponding to normal operation of the loom.

GEORG WIGET.

REFERENCES CITED The following references are of record in the die ci this patent:

UNITED ST1-KES PATENTS Number Name Date 491,776 Hutchins Feb. 24, 1893 1,588,664 Dacey et al June l5, 1926 

